This is why I prefer restaurants where the kitchen is visible to diners. I waitressed as a young thing in a couple of high end restaurants where the kitchen was not visible to diners, and I can tell you, nasty things sometimes happened to food in those places. I also worked as the main cook in a restaurant in a small town for six months, and it was a constant battle to keep the owner-manager and fill-in cook from endangering the eating public with his disregard for sanitation, refrigeration, and safe cooking methods.